| Project/Area Number |
24700270
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Cognitive science
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
O'HASHI Kazunori 独立行政法人理化学研究所, 脳科学総合研究センター, 研究員 (90617458)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 情報表現 / 多点電極 / 多点電極記録 |
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| Outline of Final Research Achievements |
To verify a hypothesis that neural representation dynamically alters with mental state, we recorded spike activities and local field potentials (LFPs) from the inferior temporal object columns in a monkey performing three different tasks with identical visual stimuli: fixation, attention and memory tasks, using a multi contact electrode. I observed that the identical stimulus set elicited different columnar object responses, depending on the task demands: mental states. Particularly, task demands affected on neural response dynamics to visual stimuli. To investigate how the task dependency occurs, I applied current source density (CSD) analysis to LFPs obtained from each task. CSD results demonstrated that information flow among cortical layers changed with task demand, although the flows just after visual input were consistent among tasks. These results suggest that task dependent responses would result from the difference of visual information flow among cortical layers.
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